xpath

问题 I don't understand very well the purpose of normalize-space() . I think it's very useful. In fact, I always use it when I am doing tests, but I am not sure the principal purpose. For example, in these two cases, what are the differences? What is the advantage of using it? Example 1 WebElement seleccionLabelCabecera = findBy(xpath("(//div[contains(normalize-space(@class), 'windowViewMode-maximized active')"] Example 2 WebElement seleccionLabelCabecera = findBy(xpath("(//div[@class,

问题 I'm trying to get the xmlns:attr attribute value from this XML using XPath. I can't seem to get it. <a:b xmlns:attr="value"> </a:b> This is from the root node. I've tried just about every combination, but I can't seem to find anything that works. 回答1: Setting aside the distraction of the undeclared a: namespace, let's instead use this example: <b xmlns:attr="value"/> Note : Your name choice of attr belies the fact that in the above XML, attr is not an attribute but rather is a namespace

问题 Is there a difference between the following two xpath expressions? child::* child::node() I tried both expressions on this playground page and got the same result. W3schools says child::* Selects all element children of the current node child::node() Selects all children of the current node but I do not get the difference. 回答1: Both child::* and child::node() refer to the children of the current node, so the difference is really in the difference between that of an element and a node . An

问题 I want to check using xpath an node in the xml contains empty string/spaces. What is the xpath expression i need to use? eg: <p:insert_acc_data_file xmlns:p="http://ws.wso2.org/dataservice"> <p:Id>123</p:Id> <p:Name></p:pName> </p:insert_acc_data_file> How to check the Name node is empty or containing space values? 回答1: By checking if a node is empty I guess you mean has no child element (text or node) . Checking if a node contains only space values can be done using normalize-space()

问题 I want to check using xpath an node in the xml contains empty string/spaces. What is the xpath expression i need to use? eg: <p:insert_acc_data_file xmlns:p="http://ws.wso2.org/dataservice"> <p:Id>123</p:Id> <p:Name></p:pName> </p:insert_acc_data_file> How to check the Name node is empty or containing space values? 回答1: By checking if a node is empty I guess you mean has no child element (text or node) . Checking if a node contains only space values can be done using normalize-space()

问题 I'm trying to learn how to scrape web pages and in the tutorial I'm using the code below is throwing this error: lxml.etree.XPathEvalError: Invalid predicate The website I'm querying is (don't judge me, it was the one used in the training vid :/ ): https://itunes.apple.com/us/app/candy-crush-saga/id553834731 The xpath string that causes the error is here: links = tree.xpath('//div[@class="center-stack"//*/a[@class="name"]/@href') I'm using the LXML and requests libraries. If you need any

问题 I'm trying to learn how to scrape web pages and in the tutorial I'm using the code below is throwing this error: lxml.etree.XPathEvalError: Invalid predicate The website I'm querying is (don't judge me, it was the one used in the training vid :/ ): https://itunes.apple.com/us/app/candy-crush-saga/id553834731 The xpath string that causes the error is here: links = tree.xpath('//div[@class="center-stack"//*/a[@class="name"]/@href') I'm using the LXML and requests libraries. If you need any

问题 For example, for the xml below <REPORT ID="TimekeeperListEdited" BoundId="Timekeeper" BoundType="ReportObject" /> How to match the first record with xpath like //*[@BoundId='TimeKeeper'] . Is there xpath function to do this? 回答1: If you are using XPath 2.0 , you can use the lower-case() function: //*[lower-case(@BoundId) = 'timekeeper'] In case your use is restricted to XPath 1.0 , you can convert cases with the translate() function which replaces each character in your string (first argument

问题 Given the following XML: <root> <li><span>abcText1cba</span></li> <li><span>abcText2cba</span></li> </root> I want to select all li elements having a span child node containing an inner text of Text1 - using an XPath. I started off with /root/li[span] and then tried to further check with: /root/li[span[contains(text(), 'Text1')]] However, this does not return any nodes. I fail to see why, can somebody help me out? 回答1: Just for readers. The xpath is correct. OP: Perhaps xpath parser didnt

问题 Given the following XML: <root> <li><span>abcText1cba</span></li> <li><span>abcText2cba</span></li> </root> I want to select all li elements having a span child node containing an inner text of Text1 - using an XPath. I started off with /root/li[span] and then tried to further check with: /root/li[span[contains(text(), 'Text1')]] However, this does not return any nodes. I fail to see why, can somebody help me out? 回答1: Just for readers. The xpath is correct. OP: Perhaps xpath parser didnt